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Securities Financing (Tables)

12 Months Ended

Dec. 31, 2015

Equity [Abstract]

Summary of Redeemable Preferred Stock

		Series E Redeemable Preferred								Series F Redeemable Preferred
		Shares				Amount				Shares				Amount
		(Dollars In Thousands)
Balance at December 31, 2014			—			$	—				—			$	—
Issuance of redeemable preferred stock, net of discount and issuance costs of $10.6 million			210,000				174,299				1				—
Accretion relating to liquidation preference on preferred stock			—				467				—				—
Accretion for discount and issuance costs on preferred stock			—				219				—				—
Accumulated dividends			—				2,287				—				—
Balance at December 31, 2015			210,000			$	177,272				1			$	—